Grooving tool

ABSTRACT

A toolholder clamp combination which includes a body having a forward seat area for a cutting insert, there being a recess behind the seat area in a side wall of a body with a fulcrum pin embedded into the toolholder within this recess. A tool clamp then has a portion which fulcrums on this pin, the forward portion of the pin serving as an indexing stop for the insert. The remainder of the clamp curves up and over the insert and carries a pressure screw which exerts against a wall of a recess to apply clamping pressure while fulcruming the clamp around the pin.

nited States Patent Bartoszevicz 51 Sept. 26, 1972 [54] GROOVING TOOL[72] Inventor: Joseph G. Bartoszevicz, Plantsville,

Conn.

[73] Assignee: Fansteel Inc., North Chicago, Ill,

[22] Filed: March 8, 1971 [21] Appl. No.: 121,838

[52] US. Cl ..29/96, 299/92 [51] Int. Cl. ..B26d l/00 [58] Field ofSearch ..299/92, 93; 29/96, 97, 98;

[5 6] References Cited UNITED STATES PATENTS 1,306,039 Tufts ..29/96 X1,484,332 2/1924 Jacques ..29/96 Primary Examiner-Andrew V. KundratAttorney-Barnes, Kisselle, Raisch & Choate 5 7] ABSTRACT A toolholderclamp combination which includes a body having a forward seat area for acutting insert, there being a recess behind the seat area in a side wallof a body with a fulcrum pin embedded into the tool holder within thisrecess. A tool clamp then has a portion which fulcrums on this pin, theforward portion of the pin serving as an indexing stop for the insert.The remainder of the clamp curves up and over the insert and carries apressure screw which exerts against a wall of a recess to apply clampingpressure while fulcruming the clamp around the pin.

1 Claim, 4 Drawing Figures mtmmssrz m 3.693; 224

INVENTOR. JOJZAI/ 6. lswkraszzrxcz ATTORNEYS GROOVING Tool.

This invention relates to a Grooving Tool and more particularly to animproved tool wherein a clamp is squarely disposed over the tool in amanner to apply positive downward pressure to an insert against a toolcrum which locks the clamp in place and also serves as an indexing stopfor a cutting insert.

Other objects and features of the invention will be apparent in thefollowing description and claims in which the principles of theinvention are set forth together with the best mode presentlycontemplated for the invention.

Drawings accompany the disclosure and the various views thereof may bebriefly described as follows:

FIG. 1, a side view of a tool holder combination.

FIG. 2, a top view of the assembly.

FIG. 3, an end view of the assembly.

FIG. 4, a sectional view on line 4-4 of FIG. 2.

REFERRING TO THE DRAWINGS:

A tool holder body has a frontal projecting portion 11 with a V-grooveseat 12 for holding an indexable insert 14 to serve primarily as agrooving tool, this insert having a cutting end 16. The insert has a V-shaped bottom which complements the V bottom of the seat 12. At therearward end of the seat 12 is a recess 18, the defining wall of whichswings downwardly and then back up to a top surface of the tool. Thisdefining wall of the recess is perpendicular to the surface 22 of thetool on the seat side with a rear wall which is parallel to said sidesurface. Within the confines of this recess and spaced from the definingwall is a pin 24 which is embedded in a hole 26 in the tool body 10,this pin projecting outwardly so the outer end lies in the plane of theside surface 22 of the tool. The pin is positioned at the rear end ofthe seat 12 so that it will be seen that the inside end of an insertwill back up against it and be located accurately relative to the toolholder.

A tool clamp 30 is designed to have a bottom portion 32 with a recess 34which fits over the pin 24 so that the clamp will slide sideways intothe recess 18 in a fulcruming position on the pin 24. The clamp has aforward nose portion 36 which overlies the insert 14. The clamp also hasan intermediate portion 38 between the portions 32 and 36 provided witha hole 40 in which there is threaded a screw 42. This screw projects outthe back of the clamp so that it engages a rear surface 44 of thedefining wall of recess 18. With this arrangement, it will be seen thatscrewing in of the screw 42 in the hole 40 will cause a fulcruming ofthe clamp 30 around the pin 24, thus exerting a downward pressure on theinsert 14.

Thus, there is a positive and square clamping action against the insertand the structure provides also a clear view of the locat r pin sotlhalt an operator can readily see when assem ling whe er or not thereIS any foreign matter or chips in the way which would prevent properlocation of the insert. If desired, a recess can be provided in thesurface 44 to locate the screw so that it will always fall in the sameposition. It will be readily understood that this design can be appliedto two sides of a holder and it also permits the use of a multiplicityof holders adjacent each other without side interference. In addition,the clamp has approximately the width of the insert itself so that itdoes not encumber the remainder of the tool body.

I claim:

1. A tool holder for a cutting insert comprising a shank having at acutting end a top and bottom surface and connecting side surfaces inwhich a seat recess for a cutting insert is formed on one of said topand bottom surfaces at the cutting end adjacent one said side surface,said one side surface having a clamp recess formed therein spacedrearwardly of the body from said seat and open to said one side surfacehaving walls extending to said side surface and a base surface spacedfrom said side surface, a pivot pin mounted in said holder extendingfrom said base surface directly rearward of said insert recess toprovide a rearward stop for an insert in said insert recess, and aC-shaped insert clamp having a central recess pivotally fitted on saidpin and open on one side toward said insert seat recess, one leg of saidC clamp extending below said pin to serve in a retaining capacity, oneleg of said C clamp extending over said insert seat recess having aclamping portion to contact an insert, and a means carried at the backof said C clamp to exert a force between a wall of said clamp recess andsaid C clamp to cause said C clamp to pivot about said pin to urge saidclamping portion into contact with an insert in said insert recess.

1. A tool holder for a cutting insert comprising a shank having at acutting end a top and bottom surface and connecting side surfaces inwhich a seat recess for a cutting insert is formed on one of said topand bottom surfaces at the cutting end adjacent one said side surface,said one side surface having a clamp recess formed therein spacedrearwardly of the body from said seat and open to said one side surfacehaving walls extending to said side surface and a base surface spacedfrom said side surface, a pivot pin mounted in said holder extendingfrom said base surface directly rearward of said insert recess toprovide a rearward stop for an insert in said insert recess, and aC-shaped insert clamp having a central recess pivotally fitted on saidpin and open on one side toward said insert seat recess, one leg of saidC clamp extending below said pin to serve in a retaining capacity, oneleg of said C clamp extending over said insert seat recess having aclamping portion to contact an insert, and a means carried at the backof said C clamp to exert a force between a wall of said clamp recess andsaid C clamp to cause said C clamp to pivot about said pin to urge saidclamping portion into contact with an insert in said insert recess.